Finding the Fourth Proportional to 23,215.32, 32,039.12 and 13,145.53

Step by Step Solution

1. Step 1: Write the proportion equation
   23,215.32 : 32,039.12 = 13,145.53 : x
2. Step 2: Convert to fraction form
   23,215.32/32,039.12 = 13,145.53/x
3. Step 3: Cross multiply
   23,215.32x = 32,039.12 × 13,145.53
4. Step 4: Simplify right side
   23,215.32x = 421,171,309.66
5. Step 5: Solve for x
   x = 421,171,309.66/23,215.32
6. Step 6: Final answer
   x = 18,141.96